Sea Temperature

San Juan Sea Temperature

(Today) Oct 2019

29.7°C / 85.4°F

Current weather

24°C / 75°F
(shower rain)

Partly cloudy

3 mph



The measurements for the water temperature in San Juan, San Juan are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.

Monthly average max / min water temperatures

The graph below shows the range of monthly San Juan water temperature derived from many years of historical sea surface temperature data.

Maximum and minimum monthly sea temperatures in San Juan
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 25.4 24.9 25.4 25.5 26.4 27.1 27.4 28.2 28.5 28.2 28 27
Max °C 27.3 26.8 26.4 27.7 28 29.1 29.6 29.8 30.2 29.8 29 28.3
Min °F 78.4 77.5 78.1 78.8 80.2 81.6 82.2 83.4 83.9 83.4 82.8 81.1
Max °F 80.3 79.4 79.1 81 81.8 83.6 84.4 85 85.6 85 83.8 82.4

7 day tide forecast for San Juan

  • Low 3:18am
  • High 10:06am
  • Low 4:31pm
  • High 9:44pm
  • Low 3:48am
  • High 10:47am
  • Low 5:19pm
  • High 10:15pm
  • Low 4:20am
  • High 11:30am
  • Low 6:08pm
  • High 10:49pm
  • Low 4:57am
  • High 12:17pm
  • Low 7:00pm
  • High 11:27pm
  • Low 5:40am
  • High 1:08pm
  • Low 7:56pm
  • High 12:16am
  • Low 6:31am
  • High 2:04pm
  • Low 8:54pm
  • High 1:17am
  • Low 7:31am
  • High 3:01pm
  • Low 9:50pm

*These tide times are estimates based on the nearest port (San Juan, Puerto Rico) and may differ by up to half and hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.

Average October sea temperatures

  • Max: 29.8°C / 85.6°F
  • Avg: 29°C / 84.2°F
  • Min: 28.2°C / 82.8°F
San Juan average sea temperature chart

These average ocean temperatures for San Juan are calculated from several years of archived data.

Map showing location of San Juan (18.466330, -66.105720)

Locations nearby


Whilst sea temperatures for San Juan are as accurate as current data allows, there may be slight local and regional variations depending on conditions. Time of day and wind direction may have a temporary local effect as can water flows from neraby rivers.

Alternate names for San Juan
Gorad San-Khuan, SJU, San Chouan, San Chuanas, San Juan, San Juan de Puerto Rico, San Khuan, San Xoan, San Xoán, San Xuan, San-Juano, San-Khuan, Sanhuana, can van, san hwn, san jwan, san khwan, san khwan, bwrtwrykw, san-khuani, sana hu'ana, sana huraana, sanfuan, sanhuan, sheng hu an, Σαν Χουάν, Горад Сан-Хуан, Сан Хуан, Сан-Хуан, Սան Խուան, סן חואן, سان جوآن, سان خوآن, سان خوان، بورتوريكو, सान हुआन, সান হুৱান, சான் வான், ซานฮวน, სან-ხუანი, サンフアン, 圣胡安, 산후안

San Juan average sea temperature chart